Despite finishing fifth in the Six Nations, Wales are understood to have more than 10 players in the squad, with hard-running centre Roberts, 30, a surprise late addition having started on the bench in all five matches in this year’s Six Nations.

However, Scotland’s representation is likely to be limited to full-back Stuart Hogg, and one of Tommy Seymour or Sean Maitland on the wing.

Northampton hooker Hartley, 31, whose chances were rated at 50-50 on Monday, would become the latest in a list of shock English exclusions.

Fellow Six Nations winners Joe Launchbury, James Haskell, George Ford, Jonathan Joseph and Mike Brown are also in danger of missing out.

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